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ADSP 21469 EVAL Kit - TWI Interrupt - Audio Glitches

Question asked by flying-egg on May 16, 2018
Latest reply on May 25, 2018 by Jithul_Janardhanan

Hello Engineerzoners,

 

I'm working with an ADSP 21469 EZ Kit and CCES 2.5.0.

 

I'm currently working on a project based upon the talkthrough example by AD.
In this example there is an audio processing interrupt, set up like this:

 

adi_int_InstallHandler(ADI_CID_P3I,process_AD1939_samples,0,true);

 

 

In my project I control variables within the "process_AD1939_samples" function through an TWI interrupt, set up like this:

 

adi_int_InstallHandler(ADI_CID_P12I, TWI_ISR, 0, true);

It all works fine, but when TWI messages arrive at the ADSP audio glitches are audible.

I guess it's because the TWI interrupt puts the audio/sport interrupt "on hold", causing dropouts within the audio signal.

 

Is there a way to avoid these kind of glitches?

Please tell me if you need any further information on my project-build to answer my question. I'll be glad to provide them.

 

BR
Kai

 

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